Gamma knife (γ knife), also known as stereotactic radiation therapy system, is a kind of therapeutic equipment integrating modern computer technology, stereotactic technology and surgical technology, it will be 60CO issued by the γ-ray geometric aggregation, concentrated in the pre-illuminated lesion, one-time, lethal destruction of tumor target tissue, and almost no harm to the ray through the normal human tissue, and the dose is sharply reduced, so its The treatment irradiation range and normal tissue boundary is very obvious, and the edge is like a knife cut. Which tumor patients are suitable for gamma knife 1, gamma knife to treat brain tumors, including intracranial metastases, auditory neuroma, meningioma, pituitary tumor, trigeminal neuroma, craniopharyngioma, teratoma, cremasteroma, glioma, etc., the best effect of tumor diameter less than 3cm. 2, for lung, liver, pancreas, kidney, adrenal gland, retroperitoneum, mediastinum, sacral anterior and other parts of the tumor can also use gamma knife, tumor diameter size 3 ~ 8cm is good. Which tumor patients are not suitable for gamma knife treatment 1, very weak, that is, tumor cachexia, a large number of thoraco-abdominal fluid, severe obstructive whistling difficulty can not lie down is not suitable. 2.Tumors of the digestive tract and cremaster and nearby areas, and tumors of the body surface are not suitable. 3, gastrointestinal tumors, such as esophageal cancer, gastric cancer, cardia cancer, colon cancer, etc. are not suitable. What are the disadvantages of Gamma Knife surgery compared with traditional surgery We know that Gamma Knife treatment has many advantages, non-invasive, non-infectious, non-anesthetic and other features that are better than scalpel. Everything is divided into two, there are advantages and disadvantages. Take the head gamma knife for example, the head gamma knife in addition to these advantages, gamma knife surgery and craniotomy also has its own shortcomings and shortcomings, these shortcomings and shortcomings are mainly determined by the mechanism and characteristics of treatment. Mainly in the following aspects: 1, Gamma Knife efficacy is slow Gamma Knife treatment, the target tissue radiobiological effects = can last 2-3 years or even longer, except for very few cases of disease efficacy relatively fast (metastases, trigeminal neuralgia, epilepsy), the rest are mostly slow. We can understand that the end of Gamma Knife surgery is actually the beginning of treatment, not the end of treatment, which requires patients to undergo Gamma Knife treatment in the next two or three years after the need for regular review to understand the changes in the tumor. 2, Gamma Knife can not be used for emergency Just because Gamma Knife efficacy is slow to produce, so it can not be used for emergency, which also determines that Gamma Knife treatment of brain tumors is only applicable to brain tumors that have not yet caused a significant increase in intracranial pressure, so the choice of indications for head gamma is particularly important. 3, gamma knife doctor’s feeling is not as direct as craniotomy craniotomy surgeon is the center of the entire operation, every step of the operation doctor is very active, at any time to deal with intraoperative problems, tumor removal clean? How much has been removed? How much of the tumor was removed and what problems might occur? The doctor’s mind is more clear. Gamma knife surgeon is different, in addition to the doctor needs to accurately grasp the different points of individual patients for treatment, gamma knife surgery is basically more procedural, automated and standardized in the whole. Patients are treated in accordance with the basic requirements of stereotactic radiosurgery, and the level of the surgeon is reflected by the machine, which is relatively less challenging and not as real and more challenging as surgical procedures. After the treatment, the gamma knife surgeon can not immediately judge the effect of the surgery as surgical procedures, can only be judged and evaluated by later review.